A two-dimensional model of combustion in spark ignition engines was applied to ten chamber configurations of three types: wedge, hemispherical, and Heron. With a compression ratio of 11.5 and a swirl ratio of 3, a range of engine speeds loads and mixture ratios was explored. The objective was to compare indicated efficiencies. For a given cylinder displacement, the indicated efficiency is found to be insensitive to chamber geometry because those changes that lead to faster combustion also lead to larger wall heat losses. However, indicated efficiency does increase with increasing cylinder displacement and a linear correlation is found between indicated efficiency and chamber surface-to-volume ratio. The computed trends are in agreement with measured ones. The additional constraints of knock, cyclic variations, and emissions were not considered. For a given cylinder displacement, different chamber geometries may still be preferable if those additional constraints are included.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Optimization of Combustion Chamber Design for Spark Ignition Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Basso, A. (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1984



    Erscheinungsdatum :

    01.02.1984




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch







    The effects of combustion chamber design on exhaust emissions from spark-ignition engines

    Evans,R.L. / Blaszczyk,J. / Univ.of British Columbia,CA | Kraftfahrwesen | 1993


    Heat Transfer to the Combustion Chamber Walls in Spark Ignition Engines

    Shayler, P. J. / May, S. A. / Ma, T. | SAE Technical Papers | 1995